Electrode connection structure of ultrasonic sensor

Abstract

The invention discloses an electrode connection structure of an ultrasonic sensor. The electrode connection structure comprises an aluminum shell, a piezoelectric ceramic piece and two lead wires; the piezoelectric ceramic piece is installed in the aluminum shell and is electrically connected with the aluminum shell; an anode and a cathode are arranged on one side of the piezoelectric ceramic piece; one end of one lead wire is electrically connected with the anode in a welding manner; one end of the other lead wire is electrically connected with the cathode in the welding manner; and the other ends of the two lead wires both extend out of the aluminum shell. According to the electrode connection structure of the ultrasonic sensor, the anode and the cathode are both arranged on one side of the piezoelectric ceramic piece, and therefore, the two lead wires used for being electrically connected with the anode and the cathode respectively are both connected with the piezoelectric ceramic piece, the contact materials are the same, and a connection circuit is stable; processing is convenient since no need to form a hole in the aluminum shell; and in addition, as the lead wires are electrically connected with the electrodes in the welding manner, the connection stability of the lead wires can be improved.

Description

technical field [0001] The invention relates to the technical field of sensor equipment, in particular to an electrode connection structure of an ultrasonic sensor. Background technique [0002] Ultrasonic sensors are sensors developed by using the characteristics of ultrasonic waves, generally including ultrasonic probes, and ultrasonic probes are composed of an aluminum shell and a piezoelectric chip set in the aluminum shell to transmit or receive signals. On the piezoelectric chip, the negative electrode is set on the aluminum shell, and the electrode is generally drawn out through the wire welded at the corresponding position, and both the positive electrode and the negative electrode are connected to the external circuit, and then formed under the action of the piezoelectric chip. Ultrasound. The piezoelectric chip in the existing piezoelectric ceramic ultrasonic sensor is a piezoelectric ceramic sheet, and the electrodes provided on the piezoelectric ceramic sheet ar...

AI Technical Summary

Problems solved by technology

The piezoelectric chip in the existing piezoelectric ceramic ultrasonic sensor is a piezoelectric ceramic sheet, and the electrodes arranged on the piezoelectric ceramic sheet are drawn out through the contact between the wire and the piezoelectric ceramic sheet, while the electrodes arranged on the aluminum shell are It is led out through the base of the wire and the aluminum material, so the materials that the ends of the two wires contact are inconsistent, which will easily cause the instability of the circuit

And because the aluminum shell is not easy to weld wires, it is necessary to open a hole in the aluminum shell and insert a rivet into the hole to form a welding point, which is inconvenient to operate

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